I am searching for C# library which has code that builds spatial index in memory based on geometry bounds and enables fast searching for all geometry inside given bounds.
I prefer free library.
Geographic Information Systems Stack Exchange is a question and answer site for cartographers, geographers and GIS professionals. It only takes a minute to sign up.Sign up to join this community
There is a C#/.NET port of JTS Topology Suite: https://github.com/NetTopologySuite/NetTopologySuite
Here's the index classes: https://github.com/NetTopologySuite/NetTopologySuite/tree/develop/NetTopologySuite/Index
Maybe try googling for specific indexing methods. For example, when I Google for
C# r-tree this is the first result.